How camera shutter works? Inside the camera 📸
Short Summary:
This video explains how a camera shutter works. It details the mechanism of a mechanical shutter, using a mirror and two curtains (blades) to control light exposure time impacting image brightness. The video highlights the difference between mechanical and electronic shutters, noting the rolling shutter effect in some mechanical systems where the image is captured sequentially from top to bottom. Different shutter speeds (e.g., 1/4s, 1/125s) and their effects on image brightness are demonstrated. The video also briefly mentions electronic shutters as an alternative technology.
Detailed Summary:
The video begins by introducing the function of the camera shutter and its role in capturing images. It explains that pressing the shutter button initiates a sequence of events.
Section 1: The Mirror and Shutter Mechanism: The video describes the 45-degree angled mirror inside the camera, allowing the user to see through the viewfinder. When the shutter button is pressed, the mirror flips up, allowing light to reach the sensor. The duration of this light exposure is determined by the selected shutter speed. Examples of shutter speeds (1/4s, 1/125s) and their meaning are provided.
Section 2: Mechanical Shutter Operation (Demonstration): The lens is removed to visually demonstrate the shutter mechanism with a 1/50s setting. The sequence is described: the mirror rises, the first shutter curtain opens, exposing the sensor to light, then the second curtain closes, followed by the mirror returning to its original position. The relationship between exposure time and image brightness is explained: longer exposure times result in brighter images, and shorter exposure times result in darker images.
Section 3: Shutter Construction and Rolling Shutter: The shutter is described as being made of metal blades (curtains) that control the light exposure. The video specifically mentions a "rolling shutter," explaining that the image is captured sequentially from top to bottom, resulting in a slight time difference between the top and bottom of the image.
Section 4: Electronic Shutters: The video briefly introduces electronic shutters as an alternative to mechanical shutters, highlighting their lack of moving parts and increasing popularity in mirrorless cameras.
Section 5: Conclusion and Call to Action: The video concludes by suggesting viewers watch other videos on related topics, such as the Apple Watch water ejection system. No specific quotes are directly attributed, but the overall explanation is presented in a clear and concise manner.